<template>
<div class="bottom-menu">
    <CheckButton class="select-all" 
    :is-checked="isSelectAll"
    @click.native="checkClick()"></CheckButton>
    <span>全选</span>
    <span class="total-price">合计: ¥{{totalPrice}}</span>
    <span class="buy-product">去计算({{checkedlength}})</span>
  </div>
</template>

<script>
import CheckButton from '../../../components/content/checkButton/CheckButton'
export default {
  name:"CartButtonBar",
  components:{
    CheckButton
  },
  methods:{
    checkClick(){
      if(this.isSelectAll)
      {
        //全选
        this.$store.state.cartList.forEach(item => item.checked = false)
      }else{
        this.$store.state.cartList.forEach(item => item.checked = true)
      }
    }
  },
  computed:{
    totalPrice() {
      return this.$store.state.cartList.filter(item =>{
        return item.checked
      }).reduce((preValue, item) =>{
        return preValue + item.price * item.count
      },0).toFixed(2)
    },
    checkedlength(){
      return this.$store.state.cartList.filter(item => item.checked).length
    },
    isSelectAll(){
      if(this.$store.state.cartList.length === 0){
        return false
      }
      return !(this.$store.state.cartList.filter(item => !item.checked).length)
    }
  }
}
</script>

<style scoped>
.bottom-menu {
    width: 100%;
    height: 44px;
    background-color: #eee;
    position: fixed;
    bottom: 50px;
    left: 0;
    box-shadow: 0 -2px 3px rgba(0, 0, 0, .2);
    font-size: 14px;
    color: #888;
    line-height: 44px;
    padding-left: 35px;
    box-sizing: border-box;
  }

.bottom-menu .select-all {
    position: absolute;
    line-height: 0;
    left: 12px;
    top: 13px;
  }

  .bottom-menu .total-price {
    margin-left: 15px;
    font-size: 16px;
    color: #666;
  }

  .bottom-menu .buy-product {
    background-color: orangered;
    color: #fff;
    width: 100px;
    height: 44px;
    text-align: center;
    line-height: 44px;
    float: right;
  }
</style>